Elon's Toy Car

public class ElonsToyCar {
private int distance = 0;
private int battery = 100;
public static ElonsToyCar buy() {
ElonsToyCar car = new ElonsToyCar();
return car;
}

public String distanceDisplay() {
    return "Driven " +distance + " meters";
}

public String batteryDisplay() {
    return battery==0 ? "Battery empty":"Battery at " + battery+ "%";
}

public void drive() {
  if(battery!=0)
  {
   battery -= 1;
   distance +=20; 
  }      
}

}